Post traumatic soft tissue cyst - leg

Case contributed by Maulik S Patel


Blunt trauma to anterior leg 4 months earlier, presents with non-painful fluctuant swelling locally

Patient Data

Age: 20 years
Gender: Male

There is an anechoic collection in subcutaneous plane of proximal leg on anterior aspect. It is close to the tibial cortex but does not abut it. It is compressible. There is a well-defined thin wall (pseudocapsule) around the lesion. without Doppler flow in the wall. Collection shows a thin septum along with a fat lobule.

  • craniocaudal: 10 cm
  • transverse: 5 cm
  • anteroposterior: 1.5 cm

Case Discussion

Ultrasound finding of subcutaneous soft tissue cyst in leg after blunt trauma. If morphologically similar lesion is seen involving the greater trochanteric region of thigh; it is called a Morel-Lavallée lesion.

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